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TT: Fachverband Tiefe Temperaturen

TT 38: Poster Session Transport

TT 38.25: Poster

Mittwoch, 16. März 2011, 14:00–18:00, P3

Electrical Characterization of Short DNA Fragments — •Matthias Wieser¹, Shou-Peng Liu², Samuel Weisbrod², Zhuo Tang², Andreas Marx², Elke Scheer², and Artur Erbe¹ — ¹Helmholtz-Zentrum Dresden-Rossendorf e.V., D-01328 Dresden — ²Universität Konstanz, D-78457 Konstanz

The electrical transport properties of DNA molecules are important for future molecular electronics applications. We characterized the electrical conductance of single DNA fragments in ambient condition and in buffer solution using a Mechanically Controllable Break Junction (MCBJ) setup which allows us binding molecules between two gold electrodes. We analyzed the electrical conductance of double stranded DNA and G-quadruplex molecules. G-quadruplex molecules consist of four guanine bases arranged in the shape of a square and a cation in the center. The electrical characterization is done by investigating the I-V curves characteristics of the molecules in different conditions.